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Significance and Use
5.1 The density, relative density, or API gravity of petroleum products are important quality indicators and are used in quantity calculations or to satisfy application, transportation, storage, and regulatory requirements.
5.2 This test method should not be used to determine density for custody transfer quantity calculations, particularly where mass or weight is the unit of quantity measurement. Test Method D4052 is appropriate for these applications.
1.1 This test method covers the determination of the density, relative density, or API gravity of liquid petroleum products using portable digital density meters at test temperatures between 0 and 40°C (32 to 104°F). Its application is restricted to samples with a dry vapor pressure equivalent up to 80 kPa (11.6 psi) and a viscosity below 100 mm2/s (cSt) at the test temperature.
1.2 This test method is suitable for determining the density to the nearest 1 kg/m3. To determine the density to the nearest 0.1 kg/m3, use Test Method D4052.
1.3 This test method is easily calibrated and primarily suitable for field applications. It is important for the user to know and understand the electrical classification of the area in which the analyzer is to be used and to select an analyzer appropriate for that classification.
1.4 Test Methods D287, D1298, and D6822 are used in field applications. This test method provides an alternative field method that is easily calibrated and does not pose the hazard of hydrometer glass breakage present in current field methods.
by the instrument using the calculation routines for Generalized Products as defined in Guide D1250.
1.6 If the density meter does not have in-built software to calculate the density at the reference temperature, this is calculated from the observed density at test temperature using the Petroleum Measurement Tables.
1.7 The accepted units of measure for density are kilograms per cubic metre (SI unit) or grams per cubic centimetre. Values in SI units are to be regarded as the standard. Values in parentheses are for information only. Both SI and customary units have been rounded; they may not be exactly equivalent.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Energy Institute StandardsIP 475 Petroleum Liquids - Manual Sampling
Adjunct to D1250-04 Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils Available from ASTM International Headquarters. Order Adjunct No. ADJD1250CD or ADJD1250CS. Original adjunct produced in 2004.
D287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
D1193 Specification for Reagent Water
D1250 Guide for Use of the Petroleum Measurement Tables
D1298 Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D6822 Test Method for Density, Relative Density, and API Gravity of Crude Petroleum and Liquid Petroleum Products by Thermohydrometer Method
ICS Number Code 75.080 (Petroleum products in general)
UNSPSC Code 41103320(Density measurement instrument)
ASTM D7777-13, Standard Test Method for Density, Relative Density, or API Gravity of Liquid Petroleum by Portable Digital Density Meter, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top